Affinity Laws

Horsepower = ______________

Kilowatts = _________________

Torque (lb-ft) = ____________

RPM

Kilowatts x 9550

Torque (N-m) = _________________

RPM

IEC-Style Contactors and Starters Selection Guide

Average Amperages for Given Horsepower Motor Ratings

The table below provides the average full-load currents of squirrel cage motors based on NEC (National Electrical Code) Tables 430-148, 149, and 150. These values are given only as a guide – they may vary depending on the type of motor and manufacturer. Refer to the actual motor nameplate for full-load current values.